Light Or Dark Grey Bookshelves? A Straw Poll

I have wallpapered the back in an ocelot print to disguise the tired Masonite, but the wood doesn’t suit the new grey palette or the wallpaper. Which shade do you think works best?

I painted a sample board and propped it up near the fireplace, which was one of the starting points for the palette. That’s Mole’s Breath on the left, and Dove Tale on right, both by the venerable Farrow & Ball.

If you had to choose, would it be the darker and more dramatic shade shown on top or the lighter one which changes considerably depending on the light.